Answer:
It is a common traffic rule that a car should stay at one cars distance from another car. This rule is formed just for the sake of safety. In situations where the car in the front presses the break suddenly for whatever reasons, it gives the car behind it to settle and press the breaks just in time to save a clash.
Therefore one should keep a safe distance so when a bus takes the wrong turn, you have enough time to save yourself from the bump.
